Yeah you can get a lot feathers if you plan ahead. I got 5,1k feathers already, and right now I'm on course to get at least 1,9k from team ranking, 500 for winning and 2,2k for cumulative ranking (currently at 542). That would be 9,7k feathers for the whole event, counting the arena rewards, I would have 40k feathers in total by the end of the week cycle.